Roll Skia from 3af709f71a60 to c5b1d50ea3c4 (2 revisions)

https://skia.googlesource.com/skia.git/+log/3af709f71a60..c5b1d50ea3c4

2021-05-26 brianosman@google.com Remove unused intrinsic enum from VM generator
2021-05-26 johnstiles@google.com Implement compile-time optimization for faceforward().

If this roll has caused a breakage, revert this CL and stop the roller
using the controls here:
https://skia-autoroll.corp.goog/r/android-master-autoroll
Please CC stani@google.com on the revert to ensure that a human
is aware of the problem.

To report a problem with the AutoRoller itself, please file a bug:
https://bugs.chromium.org/p/skia/issues/entry?template=Autoroller+Bug

Documentation for the AutoRoller is here:
https://skia.googlesource.com/buildbot/+doc/master/autoroll/README.md

Test: Presubmit checks will test this change.
Exempt-From-Owner-Approval: The autoroll bot does not require owner approval.
Bug: b/186777432
Change-Id: I52038a9406e537bd9ecd61b7017d3bef80e4406f